UPDATE: Lt. Eric Kowalczyk with Baltimore Police Department tells WBAL Radio that they received a call before 9 a.m. that a person was inside the school and might be armed.

Officers responded to the scene, but, in this case, it appears it was mistaken identity. The person students saw actually had a camera tripod.

Police continued to treat it as a possible armed person, SWAT now going room by room.

Police are not saying if they have spoken with the person with the tripod.

KIPP Harmony Academy and KIPP Ujima Village Academy remains on lock down due to a potential intruder observed by students this morning.

According to WBAL-TV's Lowell Melser reports parents didn't hear from the school. They learned about the lock down via social media and arrived at the scene.

There were no reports of a shooting. SWAT was at the scene as a precaution.

Greenspring Avenue is closed by Kipp Academy.

The official Facebook account, KIPP Baltimore, posted this message:

KIPP Harmony Academy and KIPP Ujima Village Academy are currently on lock down due to a potential intruder observed by students this morning. Both schools used standard lock down procedures and every child is in a locked classroom. Doors will not be unlocked until the police have completed a full search of the building and confirm that the building is secure. The KIPP Family and Team's first priority is the safety of each of our students. Students are doing an amazing job and are calm and secure.

Baltimore Police stated that "precautionary measures" are being taken via a tweet:

Precautionary measures are being taken at Kipp Academy. Parents are asked to respond to Poly Western High School - media briefing shortly

KIPP schools are secure and parents can pick up students from Poly-Western.

Students are being evacuated from the school via bus and will be taken to Baltimore Polytechnic Institute's auditorium where parents can pick them up. KIPP staff will stay with the students until they are picked up.

KIPP schools secured after report of intruder. Parents should pick up students from Poly-Western auditorium.